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Rh Phycriderma, 383 Phylloda squamifera, 429, fig. 86h Phyllodina, 429 Phyllonotus, 202 Physa, 293 physis, Hydatina, 276 physoides, Peracle, 293 pica, Livona, 106, 117, fig. 34 pictorum, Spondylus, 370, pi. 36a pictum, Laevicardium, 400 pileare, Cymatium, 195 pilosa, Acanthodoris, 305, 306, pi. 156 pilsbryi, Dentalium, 330, fig. 69d pilsbryi, Teinostoma, 140 pilsbryi, Zirfaea, 462 Pinctada radiata, 359, pi. 35c Pinna, 259, 320, 359 carnea, 360, pi. 27W handignobilis, 360 rudis, 360 pm7iata, Forreria, 201 Pinnidae, 359 piragua, Neosimnia, 182, pi. ji Pisania pusio, 233, pi. 13-0 pisiformis, Strigilla, 429 Pitar, 414 albida, 414 cordata, 414, pi. 380 dione, 415, pi. 39f fulminata, 414, pi. 39d lupinaria, 415 morrhuana, 414, pi. 32-I simpsoni, 414 Pitarenus, 414 Placiphorella velata, 316, fig. 66a Placopecten, 361, 366 grmidis, 366 magellanicus, 366, pis. 33c, 27m Plagioctenium, 367 plana, Crepidula, 172 Planaxidae, 150 Planaxis, 150 lineatus, 1 50 nucleus, 150 planaxis, Littorina, 134, pi. 20a planiuscula, Alacoma, 433, pi. 301 planiusculum, Pcriploma, 473, pi. 31X plamdata, Cadlina, 302 planulata, Mysella, 395 planulata, Spisula, 448, fig. 906 Platyodon cancellatus, 456 plagoszmi, Busycon, 237 plebeius, Tagelus, 440, pi. 3od plectrum, Buccinum, 225, fig. 51a plei, Doryteuthis, 483 Pleurobranchidae, 286 Pleurobranchus, 286 atlanticus, 286, fig. 61 gardineri, 287 Pleurolucina, 387 Pleuromeris, 380 Pleuroploca, 242 gigantea, 242, pi. 13a papulosa, 242 princeps, 242 Scientific Na?nes reevei, 242 Pleurotomariidae, 92 plicatella, Labiosa, 449, pi. 32q Plicatula gibbosa, 361, pi. 356 plicatula, Volsella, 352 Plicatulidae, 360 plicatjdtis, Mytilus, 352 pliculosa, Cerithidea, 152, pi. 191 plinnosa, Alopalia, 315 plumula, Lithophaga, 357 plumula kelseyi, Lithophaga, 357, pi. 29-i Plumulella, 467 Pneumoderma, 299 Pneumodermopsis, 299 P7ieumonoderma, 299 Pododesmus, 372 cepio, 372 decipiens, 372 macroschisma, 372, pi. 29d rudis, 372, pi. 38b Polinices, 185 alatus, 187 brunneus, 186, pi. 5) draconis, 187, 189, fig. 43a duplicatus, 186, 191, pis. 5k, 22h immaculatus, 186 imperforatus, 187 lacteus, 185, 187, pi. 22-i reclusianus, 187, pi. 20-i uberinus, 185 polita, Tellina, 424 politula, Persicula, 258 politus, Taglus, 441 PoUia, 233 Polycera, 305, 306 atra, 305, pi. i6e hunimi, 306 Polyceridae, 304 Polymesoda caroliniana, 381, pi. 3obb polynyma, Spisula, 446, pi. 31W Polyschides, 327 Polystira, 268 albida, 268, pi. 13-I tellea, 268, pi. 13m virgo, 268 Polytropa, 214 Pomaulax, 124 pompilius. Nautilus, 48 pomum, Alurex, 202, pi. lo-l ponderosa, Bursa, 198 ponderosa, Noetia, 346, pi. 272, fig. 28a porcella, Corbula, 459 porrecta. Lacuna, 131 porterae, Glossodoris, 303, pi. 16-I porteri, Olivella, 247 Potamididae, 151 poulsoni, Ocenebra, 218, 219, pi. 24k pourtalesi, Haliotis, 94 pourtalesianum, Propeamussium, 369, pi. pretiosula, Epitonium, 165 pretiosum, Dentalium, 330, fig. 69f pretiosum, Epitonium, 6 535 pribiloffensis, Neptunea, 230, pi. 24r prima, Cymatium (Dissentoma), 195 Primovula carnea, 181, pi. 22q princeps, Architeuthis, 483 princeps, Fasciolaria (see Pleuroploca), 242 proficua, Semele, 434, pi. 4og profundorum, Abra, 32 Promartynia, 120 promera, Tellina, 424, fig. 86c Propeamussiidae, 369 Propeamussium, 361, 369 pourtalesianum, 369, pi. 27c protea, Aplysia, 285 protexta, Terebra, 266, pi. 26k Protobranchia, 332, 334 Protocardiinae, 399 Protonucula, 341 Protothaca, 410 grata, 411 laciniata, 410 ruderata, 410 staminea, 410, pi. 31m, n tenerrima, 410 proxima, Adalaria, 306, pi. 15-i proxima, Nucula, 334, fig. 70a, b pro.xima, Scissurella, 91, fig. 29 Prunum, 254 amabile, 256, fig. 566 apicinum, 257, pi. iin, fig. 56g bellum, 256, fig. 56d borealis, 257 carneum, 254, 256, pi. iik guttatum, 256, pi. iim labiatum, 256, pi. ii-l limatulum, 257, fig. $6i roosevelti, 254, pi. ii-o virginianum, 257, fig. 56h Fsammobia, 441 Psammocola, 441 Psaimnosolen, 444 Psephidia, 41 1 lordi, 41 1, fig. 82a ovalis, 411, fig. 82b Pseudochama, 391 echinata, 393 exogyra, 393 ferrugifiea, 393 granti, 393 radians, 393, pi. 37c; fig. 79c Pseudocyrena floridana, 381, pi. 3oy pseiidohexagoniim, Dentalium, 330 Pseudomalaxis, 139 balesi, 139 nobilis, 1 39 Pseudomiltha, 387 Pseudoneptunea multangula, 211, fig. 47f Pseudopythina, 395 compressa, 395 rugifera, 395, fig. 80a psyche, Calliostoma, 1 1 3 Pteria, 359 colymbus, 359, pi. 35d sterna, 359